Snape's Criminal Daughter

Severus Snape set foot in the Potter's house suspecting the worst. And when he finds his own flesh and blood, laying in a drawer, he hides her. He brings her to an orphanage, and she is adopted and kept away from the wizarding world for fifteen years.

Eileen doesn't have a name. She wasn't given one, her mother never gave her one and the only name her father gave her were a few choice swear words. They have beaten her for years, and at the age of nine, she decides she has had enough. But when a mysterious encounter with a man brings her closer to her past than ever before, she becomes a pawn in the game. And along with discovering a newfound ability, she becomes the prime soldier in Voldemorts wannabee army.

Disclaimer: J.K. Rowling owns all of this Harry Potter characters, I own Eileen and a few other minor people!